Thermostatic governor



March 24, 1925.

H. w. PARTLow March 24, 1925. 1,530,850

H. W. PRTLOW 'THERMOSTATIC GOVERNOR Filed oct. 29, 1924 2 sheets-sheet 2 Patented Mr. 24, 1925.

UNITED rSTATES P Afr THERMOSTATIC GOVERNOR.

Application filed October 29, 1924-. Serial No. 746,511.

i Utica, in the county of Oneida and Sta-te oi New York, have invented certainnevv and useful Improvements in Thermostatic Gov'- ernors, of which the following is a specification.

This invention relates to improvements in thermostatic governors, designed particular- Vly for controlling the burners of melting pots .and the like, wherein the fuel gas is supplied at relatively high pressures. 4

The object of the invention is to provide an extremely sensitive thermostat for operating the fuel governor, whereby the slightest changes in the temperature of the contents of the melting pot, instantly effect the opening and closing of the governing valves. A further object is'to provide novel means 'for preventing' false indications of the temperature of the melting pots, due to variations in the level of the heated medium, in which the thermostat is disposed, relatively to the extent the said element may be submerged. A `further object is to provide novel means for adjusting certain of the operating parts which connect the thermostat with the governing valves. A further object is to provide cushion means for preventing breaking vor undue straining of certain of the operating parts, when the expansion and contraction of the thermostat exceeds a predetermined ranofe or continues atter the valves are closed. And a further object is to provide novel means for adjusting` the primary valve-operating mechanism for predetermining temperatures within a relatively broad range.` y

I attain these objects by the means set forth in the detailed description which follows, and as illustrated .by the accompanying drawings, in which--v Figure 1 is a central vertical section, taken on line 1 1 of Fig. 8; showing the balanced valves opened. Fig. 2 is a detached view of the thermostatic element. Fig. 3 is a similar view of the housing which encloses the said element. Fig. 41 is a detached view of the neutral rod which is enclosed by the thermostatic tube, and a portion of the rocking lever actuated by said rod. Fig. 5 is a top plan view of the extensible link which connects the rockinglever with the valve lever. Fig. 6 is aside elevation of the same. Fig.v

'.4 is a top end view of the .complete governor.

Vof Fig'.

.ing reduced and threadedpas at Fig. 8 is a horizontal section, taken onv line4 8-8 of Fig. 1.` Figs. .9, 10, 11 and 12 are detail views, showing respectively the packthe dial, the nut for controlling the adjustment of the valve lever, and the flange-member ofthe -stul'ling-box. And Fig. 13 is a central vertical section, taken online 134-13 7; showing the gas dispensingvalves closed. l y

In the drawings, 2 represents generally the hollow ybody oit the governor proper, comprising an elongated horizontal portion 2', and an integral vertically disposed cylindrical portion 2f. ends the portion 2a is divided by spaced horizontal Walls 2bfor providing a ychamber 3 which receives the uel gas through an openingf". The walls 213-29 are provided l with registering openings Q-Ze, which are fitted with bushings 4 4', in which balmg ring, the cylindrical body that/supportsV Midway between its y anced-valves are loosely disposed, the

lower ends of said bushings constituting the seats for the valves, as shown at a in F igs.V 1 andvl. The valves 5 5" are connected by a link 5, for operation as one part, and said valves are raised and lowered by a bellcrank 6, to which the uppermost valve connects b-y means of a rod 5. `When the valves as opened, as shownin Fig. 1, the gas contained inthe chamber 3 passes yiuL'i-wardly and downwardly through the bushings 4wd', i and is finally discharged from the body through vthe open bottom oit' the cylinder 2a, from `which the gas isl carried to the burners not shown). rlhe portion of the gas admitted by the bushing 1 passes into the body portion?!y from which it flows viaa passage 2f into the outlet end of the cylinder 2a. The

lever 6 is pivoted by pin 6 to the forked l lower end of a plunger 7, which yis disposed vertically in the body 2', the top end of said plunger projecting above the body and be- The plunger 7 is reciprocably supportedby `an 4elongated nut 8,-which is disposed axially in a hollow cylindrical member 9, theflatter vbeing threaded into an opening 2X of the body 2, and having an inner ledge 9` upon which the nut is supported and rotates, as shown in Fig. 13. A. portion of the nut is smaller than the bore of the member 9, and the space between said parts comprises a stuitling-box, in which a packing 9a is combushing 10"..v This packing prevents the es- ,pressed between asplit ring `10 and a lange- V vided witha slot 6b,fin which is disposed a pin Q3 for guiding the said crank during its vertical movements. The pin 23 is preferably supported by the topwall of the body 2', as

best seen in Figs. 1 and 13. The grayitative play of the bell-crank is limited by a stop 24, which is rigid to the long arm of the crank (l, and is arranged to engage the top of the wall 2b of the chamber 3, as shown in Fig. l.

Having thus described my invention what ating said bell-crank, said link being in two parts, a spring interposed between said parts normallytending to extendthe parts, a lever rockable in a vertical plane for reciprocat-v ing said link, a hollow thermostat adapted to be submerged in a medium to beheated,`

and a rod for operating said lever, said rod being disposed axially in the thermostat` adapted to be moved away from the body by the expansion of the thermostat, said rod adapted to be moved towards the body by the opening movement ofthe valve.

2. A gas governor including a hollow body adaptedto be filled with gas under pressure, having a gas receiving chamber and a gas outlet, a valve for controlling the outflow of the gas fromv the body, a bell-crank adapted f or closing said valve, a oontraetible link tor operating said bell-crank comprising two memb movable towards and away from eachother, tension means interposed between said inembersffor normally holding the members extended, a lever for oscillating said link, rod adapted to rock said lever in` a vertical plane, a hollow thermostat loosely enclosing said rod, the opposite ends of said thermostat bein T open, and a flange bushing loosely engaging the bottom end of the therinostat and adjustably engaging the corresponding end of said rod.

3.' A fuel gas governor comprising a hollow body having` a gas-receiving chamber therein and a gas outlet, a valve disposed in said chamber for controlling the flow of the from the chamber into thev body, a bellcrank for operating said valve, a reciprocable support for said bell-crank, a dial acapted to raise and lower said support for varying the opening and closing movements of said valve, a hollow leg depending fromk the body, a lever disposed in said' leg and rockable in a vertical plane, a link connect" ing said bell-crank and said lever, said link comprising two aligning membersmovable towards and away from each other, tension means for normally holding said members extended adapted to yield for contracting said link when the power of said lever is greater than .the resistance of the tension means, a thermostat below said leg, and means enclosed by said thermostat adapted for rocking .said leverwhen the thermostat expands for effecting the closing of said valve.

4. A fuel gas governor comprising a `hollow body adapted to be charged with gas under pressure having a gas receiving cham` ver and a gasoutlet, a valvein said chamber for dispensing the compressed gas, a bellv crank for closing said valve, said valve adapted to. open by gravity when the force that closes the valve is relaxed, a lever pivoted below said body movable in a vertical plane towards and away from the valve, a rod for operating said lever, ahollow thermostat below said lever adapted to `be submerged in a medium to be heated, said ther- .mostat enclosing said rod adapted when eX- panded linearly to move said rod downwardly for effecting the closing of the valve, a link. comprising two aligning members adapted to be moved towards and away from each other operatively connecting saidlever with the bell-crank, a spring disposed between said members.adapted to normally hold them extended, said spring adapted to yieldwhen the force exerted by said lever exceedsthe normal resistance ofthe spring for preventing straining of the valve and related parts in case the thermostat e011-,4 tinues Ato expand after the valve is closed.

5. ln a gas governor, a hollow body ada-pted to be charged with gas under high presy "sure having a gas receiving chamber and a gas outlet, a. pair of valves operable as one part for controlling the flow'of the from saidchamber into said body, a bell-crank for supporting and operating said valves,` a

plunger vsupporting the bell-crank, a dial'i for raising and lowering said plunger, a link for rocking said bell-crankin the direction for closing said valves, said link comprising two telescoping members` cushion means inf terposed between shouldered-portions of said members for preventing straining of the valve operating parts after the valves are closed, a hollow leg depending from the body a lever in said leg, a thermostat depending `from said leg, said thermostat comprising a tube adapt-ed `to be submerged in a medium to be heated, the opposite ends of said tube being opened, a Vrod for operating said lever disposed in said tube and anchored to the bottom thereof adapted to be moved away from the body by theexpansion of the tube, and to be moved towardsthe body by the gravitation of said valves, and a rock lever in said leg, the topand bottom ends of said lever being pivoted respectively to said link and said rod. n

6. ln a fuel gas governor, a hollow casing adapted to be charged with gas under high ypressure having inlet and outlet openings ioo p va rpair of' valves Ioperable `:as one part ffor dispensing gas lin diifi'erent directions` from Cil .member vCarried by one part `of ysaid Ilink Ahaafing .a `pin adapted to `engage the slot in lsaid bell-Crank and avhen moved l`1n one d1- reetion '-to rook said held-,crank for closingv said valve, sai-d valves yadapted .to open 'by :fgrawity when :said 'link is moved :in :the -oppesite direction, a rocking' lever pivot-ally connected .to the other lpart of said link, a rod for :rocking said lever., .and aL thermostat `for actuating-said rod, saiid thermostat com- 1prising a .tube ithat loosely enoloses said rod a'dapted to' befsubmerged in a medium to 'be heated.

f7. 'lhe combination with a. hollow `body .adapted Vto :be Icharged with Igas under high pressure, a yvalve for .dispensing :the gas for melting fine'tal :and the like, and fa train-of roekable Imenibers for operating said valve, of a hollow :leg depending from the body yand enelosingjoneiof said rockztble members, `*a thermostatdepending from said leg, :said .thermostat eompris'ingza tube adapted to be submerged in the molten imetal,ftheiopposite ends o-said tube being open, a. neutral rod disposed 'loosely'a-nd axially-fin :said tube, .a threaded `flange-bushing zadjustaibly mounted on the .lower fend .of said rod :and loosely pteleseoping :the `Correspending :end of said tube., the flange oifsaid :bushing engaging .the :end iof said v[tube adapted when Athe `tube llengthens by 4it-he rise of the ytempera-ture ofy Elthe 'metal 'to reeet the downward `movement of said rod for `closing said va.lv.e,1and a housing lComprising a/:thfi'n metal :tube ylia-ving 'its lowerzend closed and having its arp- ,per end seeured to the yhea-d of the thermostat adapted to prevent the .molten metal from coming 'in 4Contact with :the thermostat. i

8. The combination with =a yhollow body adapted to beoharged av-itlrgas at big-h pressure, la valve for dispensingthe gas 'for yadapted yto compressed lby one `of said members for preventing thestrainingor injuring of they Taflve and related parts in case thef'thermostat oontinuesnto expand 'aiiter the valve is f elosed, and 'means adjustably lmounted on the @other `member of said ylink for varying the :operative movement of lthe bell-crank.

Iiitestimony whereof laiix my signature.

HOWARD av. rnnrnoiv.

CFI 

